摘要
通过沿海沙地不同竹龄的不同径阶和不同竹高的绿竹生物量的调查 ,应用对数线性化进行回归分析 ,对 6种数学模型进行比较 ,找出绿竹秆材重量与胸径之间的相关关系最密切的数学模型Y =aDb,建立绿竹秆材重量估测模型。并运用改进单纯形法对模型参数a ,b进行优化 ,得优化生物量模型 :W =0 .2 0 6 5 4 8D2 .14 3 4 86。提高估测精度 。
A investigation of culms weight of Dendrocalamopsis oldhami was carried out in the bamboo forests with different ages over seashore dunes. By applying logarithm-linearized method to regressive ananlysis and comparing among 6 kinds of mathematical models, the models Y=aD b was found.Its relative coefficient between culm weight and DBH was the maximum. Finally, the parameters a and b of the model were optimized by modified simplex method, and the optimal model W=0.206548D 2.143486 was obtained to enhance the estimating precision in order to estimate the culm weight of Dendrocalamopsis oldhami grown over Seashore Dunes.
出处
《江西农业大学学报》
CAS
CSCD
2001年第5期170-173,共4页
Acta Agriculturae Universitatis Jiangxiensis
基金
福建省科委青年基金 (K2 0 0 10 4 8)
关键词
绿竹
沿海沙地
生物量
改进单纯形法
Dendrocalamopsis oldhami
seashore dune
biomass
modified simplex method(MSM)
作者简介
何水东(1959-),男,工程师,从事森林培育及竹林研究
